Question
The programming button on a KNX product or the BCU has to be pressed to allocate the Group Addresses during the commissioning stage.
Answer
False
False. The programming button puts the device into 'programming mode' so that ETS can write its Individual Address (Physical Address), not its Group Addresses. Once the Individual Address has been downloaded, the application program and the Group Address links are downloaded over the bus using that Individual Address as the destination, with no further button press required. Confusing the two downloads is one of the most common Basic-exam pitfalls.
Preparation tip
Rule of thumb: press the programming button only for the Individual Address download; application and Group Addresses afterwards travel silently over the bus.
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